Creating Unit vectors in a loop

9 views (last 30 days)
Hey
I have a loop an I'm trying to create some unit vectors as follows:
e1 = [1;0;0;0;0;0;0;0]
e2 = [0;1;0;0;0;0;0;0]
e3 = [0;0;1;0;0;0;0;0]
all the way to
e7 = [0;0;0;0;0;0;0;1]
Thanks
  1 Comment
James Tursa
James Tursa on 3 Feb 2020
1) Do you have to use a loop? Is that part of the assignment? There are easier ways to do this other than a loop.
2) You should not use e1 ... e7 as the variable names. This will create problems downstream in your code. I would suggest a cell array instead, e{1}, e{2}, ... , e{7}. This will make it easier to use indexing on these variables. E.g.,

Sign in to comment.

Accepted Answer

Shunichi Kusano
Shunichi Kusano on 3 Feb 2020
Hi azarang,
The following code is an example
vecLength = 8;
I = eye(vecLength);
for i = 1:vecLength
% save the vector as a field of the struct
fieldname = ['e' num2str(i)];
unitVectors.(fieldname) = I(:,i);
end
HTH

More Answers (1)

James Tursa
James Tursa on 4 Feb 2020
Since a complete answer has already been posted, I will post this one using a cell array result which will be much easier to index:
n = whatever length vectors you want
e = mat2cell(eye(n),ones(n,1),n);

Categories

Find more on Loops and Conditional Statements in Help Center and File Exchange

Products


Release

R2019b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!